The train keeps jumping off the track - Lionel Trains The Polar Express O Gauge Train Set

FIRST and MOST IMPORTANT I'm not a professional train builder .. but i am an old kid a heart and i've had electric trains at Christmas all my life. as far as track is concerned it shouldn't make any difference how much track you have... the electricity remains constant in the tracks and is only expended at the point where the train contacts it .. a poor connected track can cause a slow down or stoppage so if it happens again check individual track pieces for a poor connection, dirt, corrosion, loose connections where the tracks slide together .. it's probably a loose track connector that happens a LOT you can run a jump wire across a loose track connection (if you know how) .. don't use pliers to crimp them that only makes it worse .. i've made that mistake. you can get into trouble by adding too many additional powered items like another train or another electric station beyond what it came with.. when you do that you can stress the transformer.. in which case buy another transformer for all your stations and only use your original stuff with the old transformer... but yeah have fun with it string as much track as you want.. Merry Christmas

He was on a bridge.

Replace all the batteries, then keep the remote close to the
train. if it's too far away, it will shut down.

The train gets it's power from the track. the spark, as long as it is small, is normal. it just means the wheels left the track for a second

Make sure that the last track before the bumper is marked to be at the end of the trck - it will be marked on the bottom of the track and there will not be electrical connectors at one end of the track.

wheels are stuck and the gear drive is jumping over the gears

I had a similar problem with my 11000 Holiday Tradition Express. I cleaned the track with an eraser (pencil-type) and then used a soft cloth to clean any possible residue. After doing this twice, my train is now running.

Check the power circuit that goes to the track if there is an open circuit, open circuit means, break or cut line that can not flow the current going to the track to give a power to the train, ok.

hit it with a bigger hammer!